山西环界石油钻具制造有限公司
Exhibit Profile：
oil drilling tools including drill pipes, drill collars, non-magnetic drill collars, spiral drill collars, heavy weight drill pipes, kellys, tool joints, core tools, etc. Casing and tubing including normal casing and tubing, line pipes, corrosion preventive CRA tubular and accessory Premium Sealed Connection
oil drilling tools including drill pipes, drill collars, non-magnetic drill collars, spiral drill collars, heavy weight drill pipes, kellys, tool joints, core tools, etc. Casing and tubing including normal casing and tubing, line pipes, corrosion preventive CRA tubular and accessory Premium Sealed Connection
Website：http://www.huanjie.com.cn